As a blogger, the implicit trust of your readers is a precious commodity. That’s especially the case for your loyal readers, the people who follow your blog via email, RSS or other ways on a regular basis.
Holding on to that trust that, honoring it even, is essential if you want to continue growing your blog. At the end of the day, it’s your long-term loyal readers who will spontaneously promote your blog after all, simply because you add value to their lives.
But it’s easy to lose the trust your readers have placed in you. I’ve seen it happen with smaller blogs, but also with big, established, successful blogs. They may still grow, they may still have a big following—but they have lost the loyalty of their long-term readers.